Electrical Design Standard Symbols ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 DOCUMENT NUMBERS 501-502 ID NO INDEX SYMBOLS PAGE KEY DIAGRAMS, M V AND L V ONE LINE DIAGRAMS - 16 503 CONTROL AND WIRING DIAGRAMS 17 - 28 506 COMMUNICATION SYSTEMS 510 POWER LAY-OUTS 30 - 38 520 LIGHTING LAY-OUTS 30 - 38 530 EARTHING LAY-OUTS 30 - 38 550 CATHODIC PROTECTION 30 - 38 LOGIC SYMBOLS 39 - 40 ISSUE 29 SHEET of 40 DOC.NO BN-DS-E2 NOTES SYMBOLS HAVE BEEN DERIVED FROM IEC PUBLICATION 617, NEN 5152 AND COMPANY STANDARDS EXAMPLE ON SYMBOLS PUBLICATION IEC 617 EXAMPLE : 03-01-02 A 123 IEC NEN 5152 : NEN-K-13 NON STANDARD (NORM) : NS-52 COMPANY SEQUENCE INDEX ALL SYMBOLS MAY BE DRAWN IN ANY POSITION, THE INSCRIPTIONS SHALL REMAIN, HOWEVER IN THE UPRIGHT POSITION EXCEPTION ARE: A RELAYS, CONTACTS AND SWITCHES SHALL BE SHOWN SUCH THAT THE MODE OF OPERATION IS FROM LEFT TO RIGHT OR FROM BOTTOM TO TOP B INSCRIPTION ON CIRCUIT AND CABLES SHALL BE WRITTEN ALONG THE SYMBOLS AND SHALL BE READ FROM LEFT TO RIGHT OR FROM BOTTOM TO TOP CONTACTS OF ELECTRICAL OPERATED DEVICES SHALL BE SHOWN IN THE DEENERGIZED POSITION SWITCHES SHALL BE DRAWN IN THE OFF-POSITION OR NOT-ACTIVATED (NO PRESSURE, FLOW, ETC.) ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION 07-13-02 CONTACTOR 07-13-05 CIRCUIT BRACHER 07-13-02 DISCONNECTOR (ISOLATOR) OFF LOAD 07-13-08 SWITCH-DISCONNECTOR ON LOAD 07-21-08 FUSE-DISCONNECTOE OFF LOAD 07-21-09 FUSE SWITCH-DISCONNECTOR ON LOAD 07-14-04 VOLTAGE INDICATOR CAPACITIVE SYMBOL SYMBOL FOR KEY DIAGRAM, M.V AND L.V ONE LINE DIAGRAMS COMPANY DOCUMENT NS 501-502 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION SYMBOL NEN-B-45A SINGLE-POLE SWITCH NEN-B-45B TWO-POLE SWITCH NEN-B-45C THREE-POLE SWITCH NEN-B-45D TWO-POLE SWITCH WITH SWITCHED NEUTRAL CONDUCTOR NEN-B-45F FOUR-POLE SWITCH WITH SWITCHED NEUTRAL CONDUCTOR SYMBOL FOR KEY DIAGRAM, M.V AND L.V ONE LINE DIAGRAMS COMPANY DOCUMENT NS 501-502 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION SYMBOL 02-12-05 DELAYED ACTION IN DIRECTION OF MOVEMENT FROM THE ARC TOWARDS ITS CENTRE (DELAYED CLOSING) 02-12-06 DELAYED ACTION IN DIRECTION OF MOVEMENT FROM THE ARC TOWARDS ITS CENTRE (DELAYED OPENING) 02-12-17 MECHANICAL COUPLING DISENGAGED 02-12-18 MECHANICAL COUPLING ENGAGED 02-12-20B OPERATED BY BRAKE 02-13-01 MANUAL OPERATED CONTROL, GENERAL CASE 02-13-08 EMERGENCY SWITCH (MUSHROOM-TYPE) 02-13-09 OPERATED BY HANDWHEEL 02-13-11 OPERATED BY LEVER 02-13-12 OPERATED BY REMOVABLE HANDLE 02-13-13 OPERATED BY KEY 02-13-14 OPERATED BY CRANK NOTE: ONLY ACTION IS DESCRIPTED AND A SWITCH IS SHOWN FOR CLARIFICATION SYMBOL CAN ALSO BE USED FOR CIRCUIT BREACKERS, ISOLATORS A.S.O SYMBOL FOR KEY DIAGRAM, M.V AND L.V ONE LINE DIAGRAMS COMPANY DOCUMENT NS 501-502 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION 02-13-15 OPERATED BY ROLLER 02-13-16 OPERATED BY CAM 02-13-20 OPERATED BY SPRING 02-13-21 OPERATED BY PNEUMATIC OR HYDRAULIC CONTROL, SINGLE ACTING 02-13-22 OPERATED BY PNEUMATIC OR HYDRAULIC CONTROL, DOUBLE ACTING SYMBOL W 02-13-23 OPERATED BY ELECTROMAGNETIC ACTUATOR 02-13-26 OPERATED BY ELECTRIC MOTOR 02-13-27 OPERATED BY ELECTRIC CLOCK 02-14-01 CONTROL BY FLUID LEVEL 02-14-03 CONTROL BY FLOW NEN-J-92 OPERATED BY PEDAL NOTE: M ONLY ACTION IS DESCRIPTED AND A SWITCH IS SHOWN FOR CLARIFICATION SYMBOL CAN ALSO BE USED FOR CIRCUIT BREACKERS, ISOLATORS A.S.O SYMBOL FOR KEY DIAGRAM, M.V AND L.V ONE LINE DIAGRAMS COMPANY DOCUMENT NS 501-502 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION SYMBOL NEN-J-98 OPERATED BY CENTRIFUGAL FORCE NEN-J-102 OPERATED BY BIMETAL NS-01 HAND RESET 07-09-01B TEMPERATURE SENSITIVE SWITCH NEN-J-61 MAGNETIC OVERCURRENT PROTECTION NEN-J-62 THERMAL OVERCURRENT PROTECTION NEN-J-61-62 THERMAL AND MAGNETIC OVERCURRENT PROTECTION NEN-J-74 GROUNDFAULT PROTECTION NEN-J-76 UNDER VOLTAGE PROTECTION 02-12-07 AUTOMATIC RETURN (THE TRIANGLE IS POINTED IN THE RETURN DIRECTION) 02-12-11 MECHANICAL INTERLOCK BETWEEN TWO DEVICES 02-12-12 LATCHING DEVICE NOTE: ONLY ACTION IS DESCRIPTED AND A SWITCH IS SHOWN FOR CLARIFICATION SYMBOL CAN ALSO BE USED FOR CIRCUIT BREACKERS, ISOLATORS A.S.O SYMBOL FOR KEY DIAGRAM, M.V AND L.V ONE LINE DIAGRAMS COMPANY DOCUMENT NS 501-502 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION SYMBOL 07-16-01A 07-16-01B MEASURING RELAY OR RELATED DEVICE 07-16-01C 02-08-05 INDEPENDENT TIME-LAG 07-16-11 INVERSE TIME-LAG CHARACTERISTIC (IDMT) 07-16-03 RESIDUAL VOLTAGE 07-17-07 UNDERVOLTAGE U< 07-16-04 REVERSE CURRENT I 07-16-05 DIFFERENTIAL CURRENT 07-16-06 PERCENTAGE DIFFERENTIAL CURRENT 07-16-07 EARTH FAULT CURRENT 07-16-08 CURRENT IN THE NEUTRAL CONDUCTOR U rsd Id Id/I I I N SYMBOL FOR KEY DIAGRAM, M.V AND L.V ONE LINE DIAGRAMS COMPANY DOCUMENT NS 501-502 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION SYMBOL 07-17-04B INSTANTANEOUS OVERCURRENT I >> 07-17-04 OVERCURRENT I > 07-17-03 UNDERPOWER P< I NEN-K-13 REVERSE POWER NEN-K-21 MINIMUM IMPEDANCE 07-17-13 LOCKED ROTOR NEN-K-17 TIME 07-09-01 TEMPERATURE P Z< n O t SYMBOL FOR KEY DIAGRAM, M.V AND L.V ONE LINE DIAGRAMS COMPANY DOCUMENT NS 501-502 ID NO ISSUE SHEET 10 of 40 DOC.NO BN-DS-E2 ... DOCUMENT NS 50 1-5 02 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION SYMBOL NEN-B-45A SINGLE-POLE SWITCH NEN-B-45B TWO-POLE SWITCH NEN-B-45C THREE-POLE SWITCH NEN-B-45D TWO-POLE SWITCH... 50 1-5 02 ID NO ISSUE SHEET of 40 DOC.NO BN-DS-E2 CAD NAME DESCRIPTION SYMBOL 0 7-1 6-0 1A 0 7-1 6-0 1B MEASURING RELAY OR RELATED DEVICE 0 7-1 6-0 1C 0 2-0 8-0 5 INDEPENDENT TIME-LAG 0 7-1 6-1 1 INVERSE TIME-LAG... (IDMT) 0 7-1 6-0 3 RESIDUAL VOLTAGE 0 7-1 7-0 7 UNDERVOLTAGE U< 0 7-1 6-0 4 REVERSE CURRENT I 0 7-1 6-0 5 DIFFERENTIAL CURRENT 0 7-1 6-0 6 PERCENTAGE DIFFERENTIAL CURRENT 0 7-1 6-0 7 EARTH FAULT CURRENT 0 7-1 6-0 8 CURRENT